In which RAM type is the memory accessed as a complete unit at higher speeds?

Rambus Dynamic RAM (RDRAM) is designed to enable higher speed accesses by transferring data in a wider, more efficient manner compared to other types of RAM. It operates on a technology that allows simultaneous access to multiple bits of data, which significantly increases transfer rates. RDRAM utilizes a unique bus architecture that enables it to perform at higher speeds, effectively treating memory access as a complete unit.

This makes RDRAM particularly advantageous in applications requiring high bandwidth and low latency, such as graphics processing and high-performance computing environments. Its ability to handle data in a more streamlined and faster fashion is fundamental to its design, distinguishing it from other types of RAM that may operate at lower speeds or with less efficiency.

In contrast, the other memory types mentioned do not provide the same level of performance in terms of high-speed data access as a complete unit, making RDRAM the most appropriate answer for this question.